From the Pa. League of Women Voters:
Voter’s Bill of Rights
When you go to vote it is your right to…
Inspect a sample ballot (this should be posted near the entrance along with an instruction sheet and a penalties sheet).
Ask a poll worker for a demonstration or further instruction on how to vote on the type of system in use at that polling place.
Receive voting assistance in the voting booth.
Vote if you are in line by the time the polls close.
Vote for the candidate of your choice (In a primary election you can vote only for candidates in the political party in which you are registered).
Ask to cast a provisional ballot if your eligibility to vote is challenged for any reason.